The official Super Smash Bros. website has been updated, and a new challenger has appeared -- Toon Link! That brings the total cast so far for the Wii U and 3DS games up to 16 combatants, coming off the recent reveal of Princess Peach.
On another note, I have no idea why people always say "well that was a given!" when a character is announced for the upcoming pair of Smash Bros. games. It's already known that not every character will be returning this time around, so someone won't make the cut!
Toon Link [Smash Bros.]